Sight



0 5d! UH HUUI June 1946- s. w. FISH 2,401,752

SIGHT Filed Aug. 6, 1943 IELE- STANLEY W. Flsl-l aamvmmw i? x Patented June 11, 1946 UNITED STATES PATENT OFFICE SIGHT Stanley W. Fish, Springfield, Mass.

Application August 6, 1943, Serial No. 497,609

(Granted under the act of March 3, 1883, as

13 Claims.

The invention described herein may be manufactured and used by or for the Government for governmental purposes without the payment to me of any royalty thereon.

This invention relates to an improved sight for a firearm and particularly to an improved rear sight having windage and elevation adjustments.

It is an object of this invention to provide an improved rear sight for small arms weapons which is adjustable over a large range of windage and elevation.

Another object of this invention is to provide an adjustable rear sight composed of a minimum number of parts and having no small parts such as screws or springs which are easily broken or lost.

A particular object of this invention is to provide an adjustable rear sight which is susceptible of quantity production and can be produced from pressed metal parts.

The specific nature of the invention as well as other objects and advantages thereof will clearly appear from a description of a preferred embodiment as shown in the accompanying drawing in which:

Fig, 1 is a longitudinal sectional view of the sight taken on the plane of Fig. 2.

Fig. 2 is a top elevational view of the sight partly broken away and partly in section to show the mounting of the windage and elevation members.

Fig. 3 is a left end elevational view of Fig. 1.

Fig. 4 is a right end elevational view of Fig. 1.

Fig. 5 is a right side elevational view of Fig. 3.

Fig. 6 is a broken view similar to Fig. 1 showing a modified form of construction and assemblage of the windage and elevation members.

As shown in assembled relation in Fig. 1, this improved sight comprises only three members, a base member III, a windage member 20, and an elevation member 30. The base member ID is essentially a U-shaped member conveniently produced by pressing or stamping a piece of sheet or strip metal. The base portion of the base I is mounted in any suitable manner to the receiver or barrel of a firearm (not shown). The mounting method utilized could be spot welding, dovetail or screw type fasteners passing thru the base portion In the top forward portion of the side walls I2 and I3 of base In transverse aligned holes I4 are provided. A hole I is centrally provided in the base portion I I about a center located directly beneath the axi of the holes I4. The side wall which is bent inwardly to lie substantially at right amended April 30, 1928; 370 0. G. 757) I3 of base ID has an extension IB angles to the plane of the side wall I3 and is curved on an are about the axis of holes I 4. Suitable elevation graduations I'I, preferably in units of hundreds of yards, are provided on the rear surface of extension I6. Suitable windag graduations I8 are provided on the rear surface of the base portion, I I.

Near the rear of the base portion II, a set of windage serrations I9 are produced in the metal of the base portion These serrations are located along an arc centered on the center of hole I5. In the rear portion of the interior surface of side wall I2, there is produced a group of elevation serrations 40 which are disposed along an are having the same center as the hole The windage member 20 is essentially an inverted T-shaped member with a base portion 2| and a stem portion 22. If the proportions of a particular sight embodying this invention are ample, it is then possible to produce both the base portion and the stem portion from a single piece of strip metal by stamping out the stem portion 22 from the base 2| and bending it in a transverse position. In the illustrated construction however, the stem portion 22 is formed from a separate piece of strip metal and spot welded to the base portion 2|.

The center of the forward portion of the base portion 2| is depressed somewhat and a depending spherical projection 23 is formed in this depressed portion which, when the sight is assembled, is arranged to engage in the hole I5 of the base member I0. On each side of the depending projection 23, the base portion 2| is shaped to form projecting ears 24 which cooperate with a portion of the elevation member 30 in a manner that will be described. Near the rear of the base portion 2| of the windage member 20, a depending tooth 25 is formed which is shaped to engage in the windage serrations I9 of the base I0 when the sight is assembled. Opposite the depending tooth 25, each side of the base portion 2| is provided with ears 26 which operate to limit the extent of lateral movement.

The rear end of the base portion 2| of the windage member 20 is bent to a transverse position with respect to the base portion 2| and then bent back upon itself to form the windage knob 21. A graduation line 28 is provided on the rear surface of windage graduations I8 on the base It] when the sight is assembled. serrations 29 may also be provided in the rear surface of the knob 2! to facilitate movement of the windage member by the finger of the operator.

The top portion of the stem 22 of the windage member 20 is shaped to form a spherical surface 50. The radius of the spherical surface 50 is such that when the windage member 29 is assembled in the base H], the theoretical center of the spherical surface 50 will be located atthe intersection of the axes of the holes l4 and I5. A slot 5| is cut vertically through the spherical surface 50 and this slot acts as the elevation aperture, as will be described. The extent of the slot 5| should be made equal to the range of elevation adjustment desired for the particular sight.

The elevation member 3|l comprises an essentially inverted U-shaped member having side walls 3| and 32 and a base portion 33. The elevation member 30 may also be produced by pressing or stamping a, piece of strip metal. Approximately the front half of base portion 33 is bent back and shaped to form a spherical surface 34 which lies between the side walls 3| and 32 and is disposed essentially perpendicular to the side walls 3| and. 32. In each of the side walls there is produced an outwardly extending spherical projection 35. These projections are arranged and shaped to engage in the holes l4 when the sight is assembled.

In the vicinity of the projections 35 both of the side walls 3| and 32 are provided with depending arms 36. The bottoms of the arms 36 are bent to form a horizontal portion 31. These portions 31 bear upon theears 24 of the windage member 20 when the sight is assembled and hold the windage member 20 in place.

In the rear portion of side wall 32, a projecting tooth 38 is formed which is shaped and located to engage the elevation serrations 40 in the base when the sight is assembled. The extreme end of the side wall 32 is bent transversely to form an elevation knob 39. serrations 69 may be provided on the rear surface of the elevation knob 39 to facilitate operation by the finger of the operator.

In the extreme rear portion of the side wall 3| of the elevation member 39, a pointer 6| is punched out. The pointer 6| is arranged to lie adjacent to the elevation graduations 1 on the base l0 when the sight is assembled. The spherical surface 34 provided on the elevation member 30 is formed on a radius about the theoretical intersectionof the axes of holes l4 and I5. Extending horizontally across the centers of the spherical surfaces 34 is a slot 62 which is utilized as the windage aperture of the sight. The extent of this slot is commensurate with the range of windage adjustment desired.

In assembling the sight, the windage member 20 is inserted between the side walls I2 and I3 of the base ID with the spherical projection 23 engaging the hole in the base portion of the base H). The elevation member 30 is then placed between the side walls l2 and I3 of the base ID. The projections 35 on the side walls 3| and 32 of the elevation member 3|] engage in the holes M in the side walls l3 and I2 respectively of base ID. The width of the elevation member is such that a slight inward yielding of the walls 3| and 32 is necessary for assembly and hence the projections 35 are resiliently held in the holes M.

In this assembled position, the spherical surface 34 of the elevation member 3!! lies directly behind and contiguous to the spherical surface 50 of the windage member 20. The horizontal portions 31 of the depending arms 36 of the elevation member 30 pivotally bear upon the cars 24 of the windage member 20 holding windage member 20 in place. The depending tooth 25 on the windage member 20 is thereby held in engagement with the windage serrations l9 in the base Ill. The projecting tooth 38 in the elevation member 30 is held in engagement with the elevation serrations 40 due to the slight flexing of the walls 3| and 32 of the elevation member which is produced by the assembly.

It will therefore be apparent that a small sighting aperture is formed by the intersection of the elevation aperture 5| in windage member 20 and the windage aperture 62 in elevation member 30. The position of this resultant aperture may be shifted to compensate for windage or elevation by horizontal pivotal movement of the windage member 20 with the hole l5 as a pivot andxertieal pivotal movement of the elevation member 30 with tlT' li'oles M as a pivot. The serrated windage knob 21 and elevation knob 39 permit such pivotal movement to be readily imparted to these members by the finger of the operator. The extent of elevation or windage correction is indi-' cated respectively on the elevation graduations l1 and the windage graduations It! by the pointer 6| on elevation member 3|] and the graduation mark 28 on windage member 20. The serrations l9 and 40 hold the sight members firmly in any selected position.

An alternative construction is shown in Fig. 6 wherein the same reference numerals indicate similar parts. In this construction the windage member 20 is proportioned to assemble with spherical surface 50 in front of spherical surface 34 of elevational member 30 and an additional holding action on the windage member 20 is obtained since the spherical surface 34 of the elevation member 30 now is positioned with respect to spherical surface 50 of windage member 20 to prevent upward displacement of windage member 20.

It will therefore be apparent that a sight constructed in accordance with this invention will permit a full range of windage and elevation correction. Furthermore, such sight involves no small parts and the attendant danger of the loss of such parts during the use of the sight. This sight can be produced entirely from pressed metal parts and is therefore adapted to large quantity production.

I claim:

1. A sight comprising a base, a windage member pivotally mounted on said base for movement thru a horizontal arc, said windage member having a vertical slot, an elevation member pivotally mounted on said base for movement thru a vertical arc, said elevation member having a horizontal slot, said windage member and said elevation member arranged on said base with respect to each other to form a sighting aperture at the intersection of said slots.

2. A sight comprising a base, a windage member pivotally mounted on said base for movement thru a horizontal are, means for limiting the movement of said windage member, means for indicating the position of said windage member, said windage member having a vertical slot, an elevation member pivotally mounted on said base for movement thru a vertical arc, means for indicating the position of said elevation member, said elevation member having a horizontal slot, said windage member and said elevation member arranged on said base with respect to each other to' form a sighting aperture at the intersection of said slots.

3. A sight comprising a base, a windage mem- UB'CH UH llUUli ber mounted on said base for movement thru a horizontal arc, a spherical portion on said windage member, said spherical portion including a vertical slot, an elevation member mounted on said base for movement thru a vertical are, a spherical portion on said elevation member, said spherical portion including a horizontal slot, said windage member and said elevation member arranged on said base with respect to each other so that the spherical portions of each lie in abutting relation for all positions of said windage and elevation members whereby a variable position sighting aperture is formed at the intersection of said slots.

4. A sight comprising a base, a windage member pivotally mounted on said base for movement thru a horizontal arc, means for limiting the movement of said windage member, means for indicating the position of said windage member, a spherical portion on said windage member, said spherical portion including a vertical slot, an elevation member pivotally mounted on said base for movement thru a vertical arc, means for indicating the position of said elevation member, a spherical portion on said elevation member, said spherical portion including a horizontal slot, said windage member and said elevation member arranged on said base with respect to each other so that the spherical portions of each lie in abutting relation for all positions of said windage and elevation members whereby a variable position sighting aperture is formed at the intersection of said slots.

5. A sight comprising a U-shaped base, an elevation member pivotally supported at its forward end by the walls of said base for movement thru a vertical arc, a windage member resting on the bottom of said base and pivotally mounted at its forward end to the bottom of said base for mo-ve ment thru a horizontal arc, said elevation member having a horizontal slot, said windage member having a vertical slot, said windage member and said elevation member arranged with respect to each other to form a sighting aperture at the intersection of said slots.

6. A sight comprising a U-shaped base, an elevation member pivotally supported at its forward end by the walls of said base for movement thru a vertical are, a windage member resting on the bottom of said base pivotally mounted at its forward end to the bottom of said base for movement thru a horizontal arc, a spherical portion on said windage member, said spherical portion including a vertical slot, a spherical portion on said elevation member, said spherical portion including a horizontal slot, said windage member and said elevation member arranged with respect to each other so that the spherical portions of each lie in abutting relation for all positions of said windage and elevation members whereby a variable position sighting aperture is formed at the intersection of said slots.

7. A sight comprising a U-shaped base, an elevation member pivotally supported at its forward end by the walls of said base for movement thru a vertical are, a windage member resting on the bottom of said base and pivotally mounted at its forward end to the bottom of said base for movement thru a horizontal arc, said elevation member having a horizontal slot, said windage member having a vertical slot, said windage member and said elevation member arranged with respect to each other to form a sighting aperture at the intersection of said slots, one of the walls of said base being bent inwardly to define an arcuate surface lying adjacent and parallel to the arcuate path of said elevation member, a plurality of spaced graduations of said surface and means on said elevation member cooperating with said graduations to indicate the position of said elevation member.

8. A sight comprising a base, a windage member pivotally mounted on said base for movement thru a horizontal are, said windage member pivotally having a vertical slot, an elevation member mounted on said base for movement thru a vertical are, said elevation member having a horizontal slot, said windage member and said elevation member arranged on said base with respect to each other to form a sighting aperture at the intersection of said slots, means resiliently holding said windage member in any selected pivotal position and means for resiliently holding said elevation member in any selected pivotal position.

9. A sight comprising a U-shaped base, an elevation member pivotally supported at its forward end by the walls of said base for movement thru a vertical are, a windage member resting on the bottom of said base and pivotally mounted at its forward end to the bottom of said base for movement thru a horizontal are, said elevation member having a horizontal slot, said windage member having a vertical slot, said windage mem ber and said elevation member arranged with respect to each other to form a sighting aperture at the intersection of said slots, a projection on said windage member cooperating with serrations on the bottom of said base to yieldingly hold said windage member in any selected pivotal position and a projection on said elevation member cooperating with serrations on one of the arms of said base to yieldingly hold said elevation member in any selected pivotal position.

10. A sight comprising a U-shaped base, an elevation member pivotally supported at its forward end by the walls of said base for movement thru a vertical are, a windage member resting on the bottom of said base and pivotally mounted at its forward end to the bottom of said base for movement thru a horizontal arc, a spherical portion on said windage member formed and located with its center coinciding with the intersection of the pivotal axes of said windage and elevation members, a spherical portion on said elevation member arranged to abut the said spherical portion on said windage member and formed and located with its center coinciding with said axes intersection, whereby said spherical portions lie in abutting relation for all position of said windage and elevation members, said spherical portion on said windage member having a vertical slot therein, said spherical portion on said elevation member having a horizontal slot therein, whereby a variable position sighting aperture is formed at the intersection of said slots, a projection on said windage member cooperating with serrations on the bottom of said base to yieldingly hold said windage member in any selected pivotal position and a projection on said elevation member cooperating with serrations on one of the arms of said base to yieldingly hold said elevation member in any selected pivotal position.

11. A sight comprising a U-shaped base, an elevation member pivotally supported at its forward end by the walls of said base for movement thru a vertical are, a windage member resting on the bottom of said base pivotally mounted at its forward end to the bottom of said base for movement thru a horizontal arc, a spherical portion on said windage member, said spherical portion including a vertical slot, a spherical portion on said elevation member, said spherical portion including a horizontal slot, said windage member and said elevation member arranged with respect to each other so that the spherical portions of each lie in abutting relation for all positions of said windage and elevation members whereby a variable position sighting aperture is formed at the intersection of said slots, one of the walls of said base being bent inwardly to de fine an arcuate surface lying adjacent and parallel to the arcuate path of said elevation member, a plurality of spaced graduations on said surface and means on said elevation member cooperating with said graduations to indicate the position of said elevation member, a projection on said Windage member cooperating with serrations on the bottom of said base to yieldingly hold said windage member in any selected pivotal position and a projection on said elevation member cooperating with serrations on one of the arms of said base to yieldingly hold said elevation member in any selected pivotal position.

12. A sight comprising a U-shaped base, an elevation member pivotally supported at its forward end by the walls of said base for movement thru a vertical are, a windage member resting on the bottom of said base and pivotally mounted at its forward end to the bottom of said base for movement thru a horizontal arc, depending arms on said elevation member bearing on said windage member to hold it in place, aid elevation member having a horizontal slot, said windage member having a vertical slot, said windage member and said elevation member arranged with respect to each other to form a sighting aperture at the intersection of said slots.

8 13. A sight comprising a 'U -shaped base,;an elevation membggggggtallyes orted at its forward e by the walls of said base for movement thru a xerticalarma windage member resting on the bottom of said baseand'pivotally mounted at its forward end to the bottom of said base for movement thru a horizontal arc, depending arms on said elevation member bearing on said windage member to hold it in place, a spherical portion on said windage member formed and located with its center coinciding with the intersection of the pivotal axes of said windage and elevation members, a spherical portion on said elevation member arranged to abut the said spherical portion on said w dage member and formed and located with its center coinciding with said axes intersection, whereby said spherical portions lie in abutting relation for all positions of said windage and elevation members, said spherical portion on said windage member having a vertical slot therein, said spherical portion on said elevation member having a horizontal slot therein, whereby a variable position sighting aperture is formed at the intersection of said slots, indicating means on said windage member cooperatin with graduations on said base to indicate the position of said windage member and indicating means on said elevation member cooperating with graduations on one of the arms of said base to indicate the position of said elevation member, a projection on sa d windage member cooperating with serrations on the bottom of said base to yieldingly hold said windage member in any selected pivotal position and a projection on said elevation member cooperating with serrations on one of the arms of said base to yieldingly hold said elevation mem ber in any selected pivotal position.

STANLEY W. FISH.

Certificate of Correction June11,1946. 5?

Patent No. 2,401,752.

STANLEY W. FISH It is hereby certified that error appears in the printed specification of the above numbered patent requiring correction as follows: Column 6, line 910, claim 8, strike out the word pivotally and insert the same before mounted in line 11, same claim; and that the said Letters Patent should be read with this correction therein that the same may conform to the record of the case in the Patent OfiEice.

Signed and sealed this 29th day of October, A. D. 1946.

LESLIE FRAZER,

First Assistant Gammz'ssioner of Patents.

Certificate of Correction Patent No. 2,401,752. June 11, 1946.

STANLEY W. FISH It is hereby certified that error appears in the printed specification of the above numbered patent requiring correction as follows: Column 6, line 910, claim 8, strike out the word pivotally and insert the same before mounted in line 11, same claim; and that the said Letters Patent should be read with this correction therein that the same may conform to the record of the case in the Patent Ofiice.

Signed and sealed this 29th day of October, A. D. 1946.

LESLIE FRAZER,

First Assistant Commissioner of Patents. 

